import java.util.Scanner;

public class Main1627 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        int x = 90;
        if (a >= x || b >= x || c >= x) {
            System.out.println("beijing");
        } else {
            System.out.println("nanjing");
        }
    }
}
